Abstract
While construction CALS/EC is promoted, it is important to make full use of the drawings over the life cycle of a public works project to improve its productivity. However, drawing formats are different from phase to phase in the whole life cycle. For a road project of Ministry of Land, Infrastructure, Transport and Tourism (MLIT), for example, Survey is managed with expanded DM data while design and construction works are managed with CAD (SXF) data, and maintenance with GIS data. Therefore, MLIT developed a system for converting expanded DM to CAD/SXF, and CAD/SXF to GIS, to make full use of the data. Regarding the public works projects of the local governments, on the other hand, formats for survey, design, and construction works are similar to those in MLIT. However, maintenance is often managed with expanded DM. Therefore, in the local governments, there is a need for converting CAD/SXF of the construction works products into expanded DM so that the expanded DM to be used for maintenance can be efficiently provided. However, in many foreign countries and Japan, standard specifications or conversion systems for converting CAD/SXF to expanded DM are not provided. In this study, we developed conversion specifications from CAD/SXF to expanded DM, and a system for converting CAD/SXF into expanded DM. In addition, we prove the usability of the method devised in this study by converting CAD/SXF into expanded DM using the drawings used in public works projects.
